JP2011185115A - Method of manufacturing cleaning device for automobile - Google Patents

Abstract

A purification device for an automobile in which a plurality of purification bodies are arranged in series in a cylinder, and at least one of the purification bodies can have a substantially elliptical column shape or a substantially polygonal column shape. Provided is a method for manufacturing an automobile purification device.
SOLUTION: A substantially columnar purification body 121, a substantially elliptical columnar or substantially polygonal columnar purification body 122, and holding members 131, 132 provided around each of them are accommodated in a cylindrical body 11 in series arrangement. The first step, the second step of fixing one end of the cylinder 11, the roller 22 is pressed against the outer periphery of the cylinder 11, and the roller 22 is relatively revolved around the outer periphery of the cylinder 11. A third step of reducing the diameter of the cylindrical body 11 so as to follow the shape of the purifying bodies 121 and 122 by gradually moving toward the radial center of the body 11. The manufacturing method of the purification equipment for motor vehicles provided.
[Selection] Figure 6

Description

  The present invention relates to a method for manufacturing a purification device for automobiles in which a plurality of purification bodies and holding members provided around each of the purification bodies are accommodated in a cylinder in a series arrangement.

  As a manufacturing method of a purification device for an automobile in which purification bodies such as a plurality of catalyst carriers and holding members provided around each of them are accommodated in series in a cylinder, catalyst carriers are accommodated in series in a cylinder, and cylinders This is a method for manufacturing a catalytic converter that forms a reduced diameter portion having a flat surface for mounting a sensor at a position corresponding to the position between the catalyst supports on the body. A step of forming a reduced diameter portion having a flat surface by pressing the reduced diameter portion, a step of punching the flat surface to form a sensor mounting hole, and both sides of the reduced diameter portion A step of inserting and arranging a catalyst carrier having a holding material wound around the outer periphery thereof, a step of forming a tapered portion by spinning with a roller at both ends of the cylindrical body, and a step of attaching a sensor to the attachment hole. Preparation There is shall (see Patent Document 1).

JP 2009-127604 A

  By the way, as an automobile purifying apparatus for accommodating a plurality of purifying bodies and holding members provided around each of them in a cylindrical arrangement in a serial arrangement, for example, at least one of the purifying bodies such as a catalyst carrier has an approximately elliptical column shape or an approximately There is also a need for a purification device for automobiles having a polygonal column shape. However, in the above manufacturing method, although it is possible to manufacture an automobile purification device that holds a columnar catalyst carrier in a cylindrical body via a holding material, it is not possible to manufacture other automobile purification devices. Therefore, there is a demand for a method capable of manufacturing an automobile purification device in which at least one of purification bodies such as a catalyst carrier has a substantially elliptical column shape or a substantially polygonal column shape.

  Further, in the above manufacturing method, the step of reducing the diameter corresponding to the position between the catalyst carriers of the cylindrical body with a roller, the subsequent step of inserting the catalyst carrier and the holding material, and processing the tapered portions at both ends of the cylindrical body with the roller Thus, it is necessary to perform a step of holding the catalyst carrier and the holding material. That is, in order to hold the catalyst carrier and the holding material, it is necessary to carry out the roller forming process twice, and there is a problem that the number of manufacturing steps and the manufacturing cost increase.

  This invention proposes in view of the said subject, Comprising: The purification | cleaning device for motor vehicles by which a some purification body is arrange | positioned in series in a cylinder, At least 1 of a purification | cleaning body becomes a substantially elliptic cylinder shape or a substantially polygonal column shape. It is an object of the present invention to provide a method for producing an automobile purification device that can produce an automobile purification device. Another object of the present invention is to provide a method for manufacturing an automobile purifying device that can improve the efficiency of the manufacturing process and reduce the manufacturing cost.

A method for manufacturing a purification device for automobiles of the present invention includes a plurality of purification bodies, at least one of which is a substantially elliptical columnar or substantially polygonal columnar purification body, and a holding material provided around each of them in series in a cylinder. A second step of fixing at least one end of the cylindrical body, a roller pressed against the outer periphery of the cylindrical body, and the roller relatively revolving around the outer periphery of the cylindrical body And a third step of gradually reducing the diameter of the cylindrical body so as to follow the shape of the purification body by moving gradually toward the radial center of the cylindrical body. It is characterized by that.
In the above-described configuration, it is possible to manufacture an automobile purification device in which a plurality of purification bodies are arranged in series in a cylinder, and at least one of the purification bodies has a substantially elliptical column shape or a substantially polygonal column shape. it can.

In the third step of the method for manufacturing a purification device for automobiles of the present invention, the cylindrical body between the purification bodies is reduced in diameter, or the end of the cylindrical body is reduced in a tapered shape, or both. To reduce the diameter.
In the above-described configuration, the diameter of at least the region corresponding to the holding member of the cylinder is reduced so as to follow the shape of the purifier, and the diameter of the cylinder between the purifiers is reduced, or the end of the cylinder is tapered. Since the process of reducing the diameter into a shape or both of them can be performed in one process, the manufacturing process can be made more efficient and the manufacturing cost can be reduced.

The method for producing a purification device for automobiles according to the present invention is characterized in that the plurality of purification bodies arranged in series have a purification body having a different shape from the substantially elliptical columnar or substantially polygonal columnar purification body.
In the above-described configuration, it is possible to efficiently manufacture a purification device for an automobile having a substantially elliptic cylinder-shaped or substantially polygonal column-shaped purification body and a modified body of the same shape, and to reduce the irregular shaped purification body to the same diameter reduction step. Can be manufactured.

In the method for manufacturing a purification device for automobiles according to the present invention, the cylindrical body in which the purification body is accommodated in the first step corresponds to a position where the substantially elliptic columnar or substantially polygonal columnar purification body is disposed. Is a shape that substantially follows the shape of the substantially elliptical columnar or polygonal columnar purification body, and a region corresponding to the position where the substantially cylindrical purification body is disposed is the shape of the substantially cylindrical purification body. It is characterized by having a shape that closely follows
In the above-described configuration, the corresponding portion of the cylindrical body is shaped in advance so as to substantially follow the shape of each purification body, whereby each purification body can be stably held by the holding material and the cylindrical body with a substantially uniform force after the diameter reduction. it can.

In the method for manufacturing an automobile purification device of the present invention, in the third step, the cylinder is rotated without revolving the roller, and the roller is rotated in the radial direction of the cylinder in accordance with the rotation of the cylinder. The roller is reciprocally moved, and the roller relatively revolves on an orbit substantially corresponding to the shape of the substantially elliptical columnar or polygonal columnar purification body.
With the above configuration, it is possible to process a roller that requires a fine reciprocating motion in the radial direction of the cylindrical body by taking only the radial movement of the cylindrical body, shortening the processing time and improving the molding accuracy. Therefore, simplification, space saving, and cost reduction of the processing apparatus can be achieved.

In the method of manufacturing an automobile purification device of the present invention, in the third step, the difference between the outer diameter Da of the cylindrical body after the diameter reduction and the outer diameter Dc of the purification body corresponds to the plurality of purification bodies. The diameter of the cylindrical body is reduced so as to be substantially constant in the region of the cylindrical body.
In the said structure, a some purification body can be hold | maintained by uniform force with a holding | maintenance material and a cylinder over the whole area | region containing the holding | maintenance material of a cylinder.

In the method for manufacturing a purification device for automobiles of the present invention, when the diameter is reduced by the roller in the third step, a seat surface for attaching a sensor is formed on the cylindrical body between at least one of the purification bodies by the roller. It is characterized by doing.
In the above configuration, the seat surface for mounting the sensor of the automobile purification device to which the sensor is mounted can be formed by an efficient manufacturing process. Moreover, the metal mold | die at the time of forming a seat surface by press work becomes unnecessary, and can reduce manufacturing cost.

The automobile according to the present invention is characterized by including an automobile purification device manufactured by the manufacturing method of the present invention. The automobile of the present invention includes appropriate automobiles such as an automobile and a motorcycle.
With the above-described configuration, an automobile having the operational effects of the method for manufacturing an automobile purification device according to the present invention can be obtained.

  In the present invention, it is possible to manufacture an automobile purification device in which a plurality of purification bodies are arranged in series in a cylinder, and at least one of the purification bodies has a substantially elliptic column shape or a substantially polygonal column shape. it can. In addition, since the region corresponding to at least the holding member of the cylindrical body is reduced in diameter so as to follow the shape of the purification body, and the step of reducing the diameter of the cylindrical body between the purification bodies can be performed in one step, The manufacturing process can be made more efficient and the manufacturing cost can be reduced.

(A) is sectional drawing which shows the purification device for motor vehicles manufactured with the manufacturing method of the purification device for motor vehicles of embodiment by this invention, (b) is the cross section of the state which rotated the purification device for motor vehicles about the axis 90 degrees FIG. (A) is sectional explanatory drawing which shows the state which accommodated the purification body and holding | maintenance material in the cylinder in the manufacturing method of the purification apparatus for motor vehicles of embodiment by this invention, (b) rotated 90 degree | times around the axis | shaft of the cylinder Cross-sectional explanatory drawing which shows the cross section of the state made. Cross-sectional explanatory drawing which shows the state which fixed the cylinder of FIG. 2 with the clamp and has arrange | positioned the roller to the outer periphery. 2A is a cross-sectional explanatory view showing a state in which the diameter of the cylindrical body of FIG. 2 is reduced, FIG. 2B is a cross-sectional view taken along the line AA of FIG. 1A, and FIG. Figure. Cross-sectional explanatory drawing which shows the state which rotated the cylindrical body of Fig.4 (a) 90 degree | times to the periphery of an axis | shaft. (A)-(c) is side surface explanatory drawing explaining the track | orbit of a roller. Explanatory drawing explaining the diameter reduction amount of a cylinder. (A)-(c) is explanatory drawing explaining the processing displacement amount. The cross-sectional view of the intermediate part of the automobile purification device manufactured by the method for manufacturing the automobile purification device of the first modification. (A) is sectional drawing of the cylinder used with the manufacturing method of the purification | cleaning instrument for motor vehicles of a 2nd modification, (b) is sectional explanatory drawing which shows the cross section of the state rotated 90 degree | times around the axis | shaft of the cylinder.

[Method for Manufacturing Automotive Purifying Apparatus of Embodiment]
A method for manufacturing an automobile purification device according to an embodiment of the present invention will be described. FIG. 1 is a view showing an automobile purification device manufactured by the method for manufacturing an automobile purification device of the present embodiment, and FIGS. 2 to 4 are purification bodies in respective steps of the method of manufacturing the automobile purification device of the present embodiment. It is a figure which shows each state of a holding material and a cylinder.

  The automobile purification device 10 in the present embodiment is, for example, a catalytic converter or the like provided in an exhaust system of an automobile, and as shown in FIG. 1, the cylinder 11 and the cylinder 11 are accommodated and placed in series. A plurality of (two in this example) purification bodies 121, 122 such as a catalyst carrier and the purification bodies 121, 122 are wound around the outer periphery of the purification bodies 121, 122, and the purification bodies 121, 122 are held in the cylindrical body 11. And holding members 131 and 132 having a buffering function.

  The cylindrical body 11 has a shape corresponding to the shape of the substantially columnar purification body 121, a substantially cylindrical first holding portion 111 that is held in pressure contact with the purification body 121 and the holding member 131, and a substantially elliptical column shape or a substantially cylindrical shape. A second holding part 112 having a shape corresponding to the shape of the purification body 122 having a polygonal column shape and being held in pressure contact with the purification body 122 and the holding material 131, and a first holding part 111 And the second holding portion 112, the tapered portion 114 formed at the end of the first holding portion 111 that is one end of the cylindrical body 11, and the neck portion 115 at the tip thereof. And a tapered portion 116 formed at an end portion of the second holding portion 112 that is the other end portion of the cylindrical body 11 and a neck portion 117 at the tip thereof.

  The purifying bodies 121 and 122 have a configuration in which, for example, a catalyst material is supported by a supporting body, the purifying body 121 is formed in a substantially cylindrical shape, and the purifying body 122 is formed in a substantially elliptical column shape or a substantially polygonal column shape. ing. The purifying body 121 and the purifying body 122 are arranged in series in the cylinder 11 with a space therebetween, and are held by the first holding part 111 and the second holding part 112 of the cylinder 11 via holding members 131 and 132, which will be described later, respectively. Is done. The intermediate portion 113 in the illustrated example has an inclined surface in the longitudinal sectional view of the substantially elliptical columnar purification body 122 and the substantially elliptic cylindrical second holding portion 112, and inward in the sectional view in the minor axis direction. It has a shape having a protruding portion that protrudes, and by this protruding portion, the movement of the purifying body 121 and the purifying body 122 within the cylindrical body 11 can be more reliably regulated and the flow of the exhaust gas can be rectified. .

  The holding members 131 and 132 are, for example, mats having heat insulating properties, thermal expansion properties, and elasticity, and are wound around the outer circumferences of the purifiers 121 and 122, respectively. The purification body 121 and the holding material 131, and the purification body 122 and the holding material 132 are housed in the cylinder 11 by being inserted into the cylinder 11 before the diameter reduction in that state.

  And when manufacturing the purification | cleaning device 10 for motor vehicles by the manufacturing method of this embodiment, as shown in FIG. 2, it is the cylinder body 11 before diameter reduction of a substantially elliptic cylinder shape or a substantially polygonal cylinder shape over the whole. The substantially cylindrical purification body 121 around which the holding material 131 is provided and the substantially elliptical columnar shape or the substantially polygonal column shaped purification body 122 around which the holding material 132 is provided are inserted and accommodated for purification. The body 121 and the purification body 122 are arranged in series with a space therebetween.

  The minimum length in the radial direction of the hollow portion, such as the inner diameter in the short axis direction, of the cylinder 11 before diameter reduction in this example is the outer diameter of the holding member 131 of the purifying body 121 and the short axis of the holding member 132 of the purifying body 122. It is substantially the same length as the outer diameter of the shortest length in the radial direction, such as the outer diameter of the direction, and is long enough to allow the holding members 131 and 132 provided in the periphery to slide in the cylindrical body 11. . Further, the purifying body 121 is inserted so as to be arranged at the approximate center of the cross-sectional view in the cylindrical body 11, and the purifying body 122 is inserted so that the shape of the purifying body 122 is aligned with the direction of the shape of the cylindrical body 11 in the cross-sectional view. For example, it is inserted so that the major axis and the minor axis of the approximately elliptic cylinder and the approximately elliptic cylinder are in the same direction, or the corners of the approximately polygon cylinder and the approximately polygon cylinder are aligned.

  Next, as shown in FIG. 3, the end portion on the side where the purifying body 122 and the holding material 132, which are the other end portion of the cylindrical body 11, are gripped from the outer periphery by the clamp 21 and fixed. It should be noted that the end on one side of the cylindrical body 11 and the end on the side where the holding member 131 is provided are gripped and fixed by the clamp 21 from the outer periphery, and the steps described below are performed from the opposite side. Is also possible.

  Next, as shown in FIGS. 3 to 5, the roller 22 is pressed against the outer periphery of the cylindrical body 11, and the roller 22 is relatively revolved around the outer periphery of the cylindrical body 11 toward the radial center of the cylindrical body 11. By gradually moving the cylindrical body 11, the region corresponding to at least the holding members 131 and 132 of the cylindrical body 11 is reduced in diameter so as to follow the shape of the purification bodies 121 and 122, and the cylindrical body 11 between the purification bodies 121 and 122 is moved. Reduce diameter. The roller 22 may be configured as a single roller or as a plurality of rollers, and a plurality of rollers 22 is preferable because the processing time can be shortened and the processing cost can be reduced.

  In this example, the clamp 21 is rotated to rotate the cylindrical body 11 about the axis, and the roller 22 is pressed against the outer periphery of the cylindrical body 11 to rotate the roller 22, whereby the second holding corresponding to the purification body 122 is performed. The first holding portion 111, the tapered portion 114, and the neck portion 115 corresponding to the portion 112, the intermediate portion 113, and the purification body 121 are formed. At this time, the roller 22 is not revolved, but as shown in FIG. 6, the rotation of the cylinder 11 by the rotation of the clamp 21 causes the roller 22 to revolve relatively around the outer periphery of the cylinder 11 to rotate the cylinder 11. The roller 22 is moved back and forth in the radial direction of the cylindrical body 11 while moving gradually toward the radial center of the cylindrical body 11, thereby reducing the reduction in weight and reducing the second holding portion 112, the intermediate portion 113, A first holding part 111, a taper part 114, and a neck part 115 are formed.

  When forming the second holding portion 112, the rotation of the cylinder body 11 by the rotation of the clamp 21 causes the roller 22 to revolve relatively around the outer periphery of the cylinder body 11 on a track substantially corresponding to the shape of the purification body 122. In the radial direction of the cylindrical body 11, the roller 22 is reciprocated in the radial direction of the cylindrical body 11 in synchronization with the rotation of the cylindrical body 11 so as to conform to the substantially elliptical cylindrical shape or the substantially polygonal cylindrical shape of the purification body 122. The diameter is reduced by moving toward the center, and the purifier 122 and the holding material 132 are held. Next, the roller 22 is gradually moved to the opposite side of the clamp 21 and the diameter reduction amount is increased, and a substantially elliptical or substantially polygonal intermediate portion 113 is formed in a side sectional view by the same reciprocating diameter reduction processing. To do.

  Further, the roller 22 is gradually moved to the opposite side of the clamp 21 and the amount of diameter reduction is increased to reduce the diameter of the first holding portion 111 and hold the purifier 121 and the holding material 131. At this time, due to the rotation of the cylinder 11 by the rotation of the clamp 21, the roller 22 relatively revolves around the outer periphery of the cylinder 11, and the roller 22 moves in the radial direction of the cylinder 11 in accordance with the rotation of the cylinder 11. So as to gradually move toward the radial center of the cylindrical body 11 while reciprocally moving, and gradually changing from a substantially elliptical or substantially polygonal orbit to a substantially circular orbit substantially corresponding to the shape of the purification body 121. The roller 22 is moved to reduce the diameter. In addition, when the cross-sectional shape of the 1st holding | maintenance part 111 is a substantially elliptical shape or a substantially polygonal shape, it forms by the diameter reduction process similar to the 2nd holding | maintenance part 112.

  Thereafter, the roller 22 is gradually moved to the opposite side of the clamp 21 and the diameter reduction amount is increased, so that the neck portion 114 and the taper portion 115 are sequentially reduced in diameter. Also at this time, due to the rotation of the cylinder 11 by the rotation of the clamp 21, the roller 22 relatively revolves around the outer periphery of the cylinder 11, and the roller 22 moves in the radial direction of the cylinder 11 in accordance with the rotation of the cylinder 11. While moving back and forth, the cylinder 22 gradually moves toward the center in the radial direction, and the roller 22 is moved and contracted so as to gradually change from a substantially elliptical or substantially polygonal orbit to a substantially circular orbit in cross section. Diameter. By this step, the tapered portion 115 and the neck portion 114 are formed at one end of the cylindrical body 11 continuously when the second holding portion 112, the inter-part 113, and the first holding portion 111 are reduced in diameter by the roller 22. Is possible. In place of the above-described process, the diameter of the cylindrical body 11 is reduced while the roller 22 reciprocates between the clamp 21 side and the neck portion 114, in other words, the roller 22 reciprocates from the second holding portion 112 to the neck portion 114. It is also possible.

  In this diameter reduction process, as shown in FIG. 7, the amount of diameter reduction when the cylinder 11 is reduced is the outer diameter Db of the cylinder 11 before the diameter reduction and the outer diameter Da of the cylinder 11 after the diameter reduction. (Db−Da) / 2, which is 1/2 of the difference between the outer diameter Da and the outer diameter Da of the cylindrical body 11 after the diameter reduction and purification in the diameter reducing step of the first holding part 111 and the second holding part 112. When the diameter is reduced so that the difference from the outer diameter Dc of the body 122 is substantially constant around the circumference of the cylinder 11 and in the axial direction of the cylinder 11, in other words, (Da−Dc) / 2 is substantially constant. The purifying bodies 121 and 122 can be held by the holding members 131 and 132 and the cylindrical body 11 with a more uniform force over the entire region including the eleven holding members 131 and 132.

  The amount of diameter reduction is, for example, the outer diameter of each part of the cylindrical body 11, the outer diameter of each part of the purification bodies 121 and 122, the weight of the holding materials 131 and 132, the holding material 131 and the purification body 121, and the holding material 132. The contact area between the cleaning body 122 and the like is measured, and the optimum diameter reduction amount of the cylindrical body 11 is calculated based on the measurement result.

Based on the calculated reduced weight, the reciprocating motion of the roller 22 in accordance with the rotation of the cylinder 11, in other words, the processing displacement amount of the roller 22 is determined. For example, as shown in FIG. 8, when the cylindrical body 11 is an oval shape having a substantially oval cross-sectional view, when the diameter of the cylindrical body 11 is reduced to the same shape, the radius of the rounded portion of the cylindrical body 11 is set. r _W, the length of the linear portion of the cylindrical body 11 (curved portion of the distance between the centers) of 2d, and the radius of the roller 22 and _{r R,} working displacement _{X 1} of curved portion of the tubular body 11, _{X 1} = d · cos θ + √ ((r _W + r _R ) ² −d ² · sin ² θ), and the machining displacement amount X ₂ of the linear portion of the cylindrical body 11 is set by X ₂ = (r _W + r _R ) / sin θ. To reduce the diameter. When a plurality of rollers 22 are provided, the processing displacement amount of each roller 22 is set according to the position of each roller 22 with respect to the cylinder 11.

  Next, when the diameter reduction processing is completed, the grip 21 is removed and the end of the cylindrical body 11 on the side where the tapered portion 115 is formed is gripped by another clamp (not shown), and the diameter-reduced roller 22 is reached. The taper part 116 and the neck part 117 are integrally formed continuously at the end part on one side by using the above operation as it is, or the taper part 116 and the neck part 117 are formed in a separate process at the end part on one side. At this time, due to the rotation of the cylinder 11 by the rotation of the clamp 21, the roller 22 relatively revolves around the outer periphery of the cylinder 11, and the roller 22 moves in the radial direction of the cylinder 11 in accordance with the rotation of the cylinder 11. The roller 22 is moved in a substantially elliptical or substantially polygonal orbit substantially corresponding to the shapes of the taper portion 116 and the neck portion 117 by gradually moving toward the radial center of the cylindrical body 11 while reciprocating in the direction. To reduce the diameter.

  In the manufacturing method of the automobile purifying apparatus of the above embodiment, the purifying body 121 has a substantially cylindrical shape, and the purifying body 122 has a substantially elliptical columnar shape or a substantially polygonal columnar shape. It can be manufactured in a process. Further, the process of reducing the diameter of the region corresponding to the holding members 131 and 132 of the cylinder 11 so as to follow the shape of the purification bodies 121 and 122 and reducing the diameter of the cylinder 11 between the purification bodies 121 and 122 is performed 1 Since the process can be performed in one process, the manufacturing process can be made more efficient and the manufacturing cost can be reduced.

  Further, the cylinder 11 is rotated without revolving the roller 22, and the roller 22 is reciprocated in the radial direction of the cylinder 11 in accordance with the rotation of the cylinder 11. It is possible to process only the radial movement of the cylinder 11 with respect to the roller 22 that needs to be reduced, shortening the processing time, improving the molding accuracy, simplifying the processing device, saving space, Cost reduction can be achieved. In addition, the plurality of purification bodies 121 and 122 can be held by the holding members 131 and 132 and the cylinder 11 with a uniform force over the entire region including the holding members 131 and 132 of the cylinder 11. Moreover, the diameter reduction process which makes the edge part of the cylinder 11 taper shape can be performed using the roller for diameter reduction processes, such as the holding | maintenance parts 111 and 112, and a manufacturing process can be made efficient.

[Modifications of Embodiment, etc.]
In addition to the configurations of the inventions and embodiments, the invention disclosed in the present specification is specified by changing these partial configurations to other configurations disclosed in the present specification within the applicable range, or these Including those specified by adding other configurations disclosed in this specification, or those obtained by deleting these partial configurations to the extent that partial effects can be obtained, These modifications are also included.

  For example, the automobile purifying apparatus in the above embodiment includes an appropriate one in addition to the catalytic converter using the purifying bodies 121 and 122 as a catalyst carrier. For example, a black smoke removing apparatus (DPF) using the purifying bodies 121 and 122 as a filter. ; Diesel Particulate Filter). Further, when the cylinder 11 is a substantially polygonal cylinder, a suitable polygonal cylinder such as a triangular cylinder, a square cylinder, or a hexagonal cylinder is included, and the shapes of the purification bodies 121 and 122 also correspond to the substantially polygonal shapes, respectively. This is preferable.

  Further, the relative revolution of the roller 22 is such that the cylinder 11 held by the clamp 21 is rotated in addition to the configuration in which the cylinder 11 held by the clamp 21 is rotated without rotating the roller 22 itself. Instead, the roller 22 may be configured to revolve. Moreover, it can also be set as the structure which moves the cylindrical body 11 to the axial direction instead of the structure which moves the roller 22 to the axial direction of the cylindrical body 11, and processes it.

  The plurality of purification bodies arranged in series in the cylindrical body 11 are, for example, a substantially elliptical columnar or polygonal columnar purification body 122, a substantially cylindrical shape, a substantially elliptical shape, a substantially polygonal columnar shape, or the like different from this. It is possible to adopt a configuration in which the purification body is made of, or a purification body 122 having a substantially elliptic cylinder shape or a substantially polygonal column shape, and a purification body having the same diameter as the purification body. Further, when the irregularly shaped purification bodies are arranged in series, it is possible to use one or a plurality of purification bodies having the same shape.

  Further, the automobile purification device 10 manufactured by the manufacturing method of the present invention is not limited to the above-described embodiment, and is appropriate within the scope of the present invention. For example, as shown in FIG. A sensor mounting seat surface 118 may be formed in the intermediate portion 113 between the bodies 121 and 122, and a sensor mounting hole 119 may be formed in the seat surface 118. In this case, when the diameter of the roller 22 is reduced, if the seat surface 118 is formed by changing the track of the roller 22 to the track on which the seat surface 118 is formed, the seat surface 118 can be formed by an efficient manufacturing process, and press working. A mold for forming the seating surface is unnecessary, and the manufacturing cost can be reduced. In this illustrated example, since the cross-sectional shape of the intermediate portion 113 is an oval shape, the seating surface 118 of the intermediate portion 113 is formed as it is during the diameter reduction processing. In addition, in the case where there are a plurality of cylindrical portions between the purifiers, it is appropriate as long as the sensor mounting seat surface 118 and the hole 119 are provided in at least one of them.

  Further, in the automobile purification device 10 manufactured by the manufacturing method of the present invention, for example, as shown in FIG. 10, the region corresponding to the position where the purification body 122 having a substantially elliptical column shape or a substantially polygonal column shape is disposed. The shape substantially conforms to the shape of the ellipsoidal columnar or substantially polygonal column purification body 122, and the region corresponding to the position where the substantially columnar purification body 121 is disposed substantially follows the shape of the substantially columnar purification body 122. The purifying bodies 121 and 122 may be accommodated in the cylindrical body 11a having a shape, and the purifying bodies 121 and 122 may be inserted and accommodated in the cylindrical body 11a, and the diameter reduction processing may be performed in the same manner as described above. In this configuration, the corresponding part of the cylinder 11 is made in a shape that substantially follows the shape of each of the purification bodies 121 and 122 in advance, so that each of the purification bodies 121 and 122 is reduced by the holding members 131 and 132 and the cylinder 11 after the diameter reduction. It can be held stably with a uniform force.

  Further, a diameter reduction process for forming a projecting part or the like projecting inwardly in the cylindrical body 11 between the purification bodies 121 and 122, or processing of the tapered parts 114, 116 and the neck parts 115, 117 at the end of the cylindrical body 11, Alternatively, both can be performed in the same process as the diameter reduction process of the region corresponding to the holding members 131 and 132 of the purifiers 121 and 122, and can be performed in a separate process such as a post process. When performing, it can be processed by an appropriate method such as spinning using a roller or another method.

  The present invention can be used, for example, as a method for manufacturing an automobile purification device provided in an automobile exhaust system.

DESCRIPTION OF SYMBOLS 10 ... Automotive purification instrument 11, 11a ... Cylindrical body 111 ... 1st holding | maintenance part 112 ... 2nd holding | maintenance part 113 ... Between part 114, 116 ... Tapered part 115, 117 ... Neck part 118 ... Seat surface 119 ... Hole 121, 122 ... Purifying body 131, 132 ... Holding material 21 ... Clamp 22 ... Roller

Claims (8)

A plurality of purification bodies, at least one of which is a substantially elliptical columnar or substantially polygonal columnar purification body, and a first step of accommodating a holding material provided around each of the purification bodies in a cylindrical arrangement;
A second step of fixing at least one end of the cylindrical body;
A roller is pressed against the outer periphery of the cylindrical body, and the roller is relatively revolved around the outer periphery of the cylindrical body to gradually move toward the radial center of the cylindrical body. A third step of reducing the diameter of the region corresponding to the holding material so as to follow the shape of the purifier,
The manufacturing method of the purification | cleaning instrument for motor vehicles characterized by including this.   In the third step, the diameter of the cylinders between the purification bodies is reduced, or the end of the cylinder is reduced in a tapered shape, or both are reduced. Item 2. A method for producing a purification device for automobiles according to Item 1.   3. The method for manufacturing a purification device for an automobile according to claim 1, wherein the plurality of purification bodies arranged in series have a purification body having a different shape from the substantially elliptical columnar or substantially polygonal columnar purification body. .   The cylindrical body in which the purification body is accommodated in the first step has a region corresponding to a position where the substantially elliptical columnar or substantially polygonal columnar purification body is disposed, in the substantially elliptical columnar shape or the substantially polygonal columnar shape. The shape substantially following the shape of the purification body, and a region corresponding to a position where the substantially cylindrical purification body is disposed is a shape substantially following the shape of the substantially cylindrical purification body. 3. A method for producing a purification device for automobiles according to 3.   In the third step, the cylindrical body is rotated without revolving the roller, and the roller is reciprocated in the radial direction of the cylindrical body in accordance with the rotation of the cylindrical body. The method for manufacturing a purification device for an automobile according to any one of claims 1 to 4, wherein the purification device relatively revolves on a track substantially corresponding to a shape of an ellipsoidal columnar or substantially polygonal columnar purification body.   In the third step, the difference between the outer diameter Da of the cylindrical body after the diameter reduction and the outer diameter Dc of the purification body is substantially constant in the region of the cylindrical body corresponding to the plurality of purification bodies. The method for producing a purification device for an automobile according to any one of claims 1 to 5, wherein the diameter of the purification device is reduced.   The sensor mounting seating surface is formed on the cylindrical body between the purification bodies at least at one place by the roller when the diameter is reduced by the roller in the third step. The manufacturing method of the purification | cleaning instrument for motor vehicles in any one.   An automobile comprising the automobile purification device manufactured by the manufacturing method according to claim 1.

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